[PATCH] board: ast-g4: Enable SGPIO in SCU

[Joel Stanley]

On Wed, 26 May 2021 at 15:51, Willy Tu <wltu at google.com> wrote:
>
> ping.
>
> I also missed the branch for this patch, but this should be in the v2016.07-aspeed-openbmc u-boot branch.
>
> On Tue, Apr 13, 2021 at 9:12 AM Willy Tu <wltu at google.com> wrote:
>>
>> Add option to enable register for SGPIO in SCU
>> for ast-g4.
>>
>> Signed-off-by: Willy Tu <wltu at google.com>

I've applied this, but I strongly encourage you to move to a newer
branch. The 2019.04 branch is based off the latest aspeed SDK which
claims support for the ast2400.

>> ---
>>  board/aspeed/ast-g4/Kconfig  |  4 ++++
>>  board/aspeed/ast-g4/ast-g4.c | 13 +++++++++++++
>>  2 files changed, 17 insertions(+)
>>
>> diff --git a/board/aspeed/ast-g4/Kconfig b/board/aspeed/ast-g4/Kconfig
>> index 2bec9a733a..e78030ae34 100644
>> --- a/board/aspeed/ast-g4/Kconfig
>> +++ b/board/aspeed/ast-g4/Kconfig
>> @@ -19,4 +19,8 @@ config SYS_CONFIG_NAME
>>         default "ast-g4-phy" if ASPEED_NET_PHY
>>         default "ast-g4-ncsi" if ASPEED_NET_NCSI
>>
>> +config ENABLE_SGPIO
>> +    tristate "Enable SGPIO in SCU"
>> +       default n
>> +
>>  endif
>> diff --git a/board/aspeed/ast-g4/ast-g4.c b/board/aspeed/ast-g4/ast-g4.c
>> index 656495307b..e2463d4524 100644
>> --- a/board/aspeed/ast-g4/ast-g4.c
>> +++ b/board/aspeed/ast-g4/ast-g4.c
>> @@ -22,6 +22,19 @@ int board_init(void)
>>         /* address of boot parameters */
>>         gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
>>         gd->flags = 0;
>> +
>> +#ifdef CONFIG_ENABLE_SGPIO
>> +       /* Unlock SCU */
>> +       writel(SCU_PROTECT_UNLOCK, AST_SCU_BASE);
>> +
>> +       /* Enable SGPIO Master */
>> +       u32 reg = readl(AST_SCU_BASE + AST_SCU_FUN_PIN_CTRL2);
>> +       reg |= (SCU_FUN_PIN_SGPMI |
>> +                       SCU_FUN_PIN_SGPMO |
>> +                       SCU_FUN_PIN_SGPMLD |
>> +                       SCU_FUN_PIN_SGPMCK);
>> +       writel(reg, AST_SCU_BASE + AST_SCU_FUN_PIN_CTRL2);
>> +#endif
>>         return 0;
>>  }
>>
>> --
>> 2.31.1.295.g9ea45b61b8-goog
>>